CN204672130U - The interactive spray system of fume desulfurating absorption tower - Google Patents

Abstract

The utility model discloses an interactive spray system for a flue gas desulfurization absorption tower. The system is arranged in the absorption tower body in parallel layers, and each layer consists of a plurality of spray main pipes, nozzles, supporting steel beams and supports; The main shower pipes are arranged opposite to each other in parallel. The diameter of the main spray pipes decreases step by step from the near end to the far end. The flow velocity in the pipe is uniform, and the flow rate of each nozzle is the same; The casing interface on the tower body is connected to the flange of the external circulation slurry pipe, and extends into the absorption tower body. The small end is placed on the support, and the middle is fixed on the supporting steel beam by hoops; Connect to the perpendicular main tube. The beneficial effects of the utility model are: the liquid-gas ratio of the desulfurization system is further improved; the layout is relatively convenient, the manufacturing process is correspondingly simplified, and the installation man-hour is also shortened. Save the layout space of the spray main pipe, reduce the height of the absorption tower, reduce the head of the circulating slurry pump, and reduce the power consumption of desulfurization.

Description

Flue gas desulfurization absorption tower interactive spray system

technical field

The utility model relates to the technical field of flue gas desulfurization, more specifically, it relates to an interactive spraying system of a flue gas desulfurization absorption tower.

Background technique

China's power plants and industrial boilers use coal as fuel, and produce SO ₂ and other harmful substances during the combustion process. In order to remove SO ₂ in the flue gas and meet the increasing environmental protection requirements, domestic thermal power plants mostly use limestone/gypsum wet process flue gas desulfurization technology.

The spray system of the absorption tower is an important part of the wet desulfurization system. The existing common spray structure of the desulfurization absorption tower is a single-side spray main pipe structure. The circulating slurry enters the spray main pipe through the slurry pipe outside the tower, and then The various branch pipes separated from the spray main pipe distribute the absorption slurry to each nozzle step by step, and finally form a netted spray layer. This type of spray structure adopts a single-side inlet pipe, and the spray slurry has a long pipeline during the transportation process, and the diameter of the pipe varies greatly, and there is a large loss along the process, resulting in uneven flow of the nozzle and affecting the spray. The uniform distribution of layers reduces the spray absorption efficiency, and ultimately affects the desulfurization and waste removal effect of the entire system. When the single-side spraying main pipe spray system is running, because the distribution of the slurry in the pipe is uneven, the load of the spray system is also uneven, and the deformation of the main pipe itself is relatively large. Hanging or lifting installation The internal steel beams also cause the problem of stress concentration. Therefore, during the design and installation of the absorption tower, it is necessary to pay attention to the load distribution of the sprinkler system, which increases the design requirements and installation difficulty.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, provide a uniform spray effect, improve the slurry absorption efficiency, balance the pipeline load distribution, increase the slurry spray volume in a limited space, and finally achieve the purpose of improving the desulfurization efficiency. Flue gas desulfurization absorption tower interactive spray system.

This kind of flue gas desulfurization absorption tower interactive spray system, the system is arranged in parallel layers in the absorption tower body, each layer consists of a plurality of spray main pipes, nozzles, supporting steel beams and supports; the spray main pipes are sequentially Arranged in parallel to each other, the diameter of the spray main pipe decreases step by step from the near end to the far end, the flow velocity in the pipe is uniform, and the flow rate of each nozzle is the same; the spray main pipe passes through the sleeve welded on the absorption tower body The pipe interface is flange-connected with the external circulating slurry pipe, and extends into the absorption tower body. The small end is placed on the support, and the middle is fixed on the supporting steel beam by a hoop; the external circulating slurry pipe of each layer is connected to the main pipe perpendicular to the connected.

As a preference: the spray main pipe is made of FRP material, and the nozzle is made of silicon carbide material.

As a preference: the connection between the nozzle and the spray main pipe is connected by FRP winding.

The beneficial effects of the utility model are:

1. In the inner support steel beam of the first floor, the double-sided entry of the main pipe is adopted to achieve the flow rate of the original two-layer spray, and further improve the liquid-gas ratio of the desulfurization system;

2. Compared with the traditional single-side spraying main pipe, the interactive spray main pipe is simpler, the layout is relatively convenient, the manufacturing and processing are correspondingly simplified, and the installation man-hour is also shortened.

3. Save the layout space of the spray main pipe, reduce the height of the absorption tower, reduce the head of the circulating slurry pump, and reduce the power consumption of desulfurization;

4. For the desulfurization efficiency improvement project, the original internal support structure can be fully utilized without increasing the height of the absorption tower, reducing the transformation workload and shortening the transformation period.

Description of drawings

Fig. 1 is a schematic diagram of a single-layer plane layout structure of the present utility model;

Figure 2 is a single-layer plan layout of a single-side pipeline;

Explanation of reference numerals: absorption tower body 1 , casing joint 2 , spray main pipe 3 , nozzle 4 , external circulation slurry pipe 5 , support 6 , supporting steel beam 7 , and main pipe 8 .

Detailed ways

Below in conjunction with embodiment the utility model is described further. The description of the following embodiments is only used to help understand the utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made to the utility model, and these improvements and modifications also fall into the protection of the claims of the utility model. within range.

The utility model desulfurization absorption tower circulating interactive spraying system can be arranged in layers in the absorption tower 1, the spraying slurry is limestone slurry, which is transported from the slurry area at the bottom of the absorption tower through the external circulating slurry pipe 5 to the spraying system through the circulating slurry pump. The mother pipe sprays and circulates continuously. Each spray layer is mainly composed of multiple spray main pipes, nozzles, supporting steel beams and supports. The connection between the nozzle 4 and the internal spray main pipe 3 adopts a winding link, and the size of the main pipe is reduced step by step to ensure that the flow rate of each nozzle is the same. The spray main pipe 3 passes through the casing interface 2 welded on the absorption tower 1 and is flanged to the external circulation slurry pipe 5, and extends into the absorption tower. The small end is placed on the support 6, and the middle is fixed on the support by a hoop. On the steel beam 7. The external circulation slurry pipe 5 of each layer is connected with the vertical main pipe 8 .

The main spray pipe 3 and the nozzle 4 can be made of different materials, and after the calculation of the spray coverage design program, it can meet the different coverage requirements of the central and peripheral nozzles, avoid scouring the tower wall 1, and optimize the arrangement of the nozzles;

The spray main pipe 3 extends into the absorption tower through the pipe joint welded on the absorption tower body, and the other end is placed on the support 6, and the middle is fixed by a hoop and a supporting steel beam;

The diameter of the internal spraying main pipe 3 is reduced step by step from the near end to the far end, so as to ensure uniform flow velocity in the pipe. The layout of the double-side inlet makes the load of each spray main pipe 3 relatively uniform, and the deformation of itself is small during operation, which is convenient for the design and installation of the spray system. The FRP winding link is used between the spray main pipe and the nozzle.

The interactive sprinkler system can be arranged in multiple layers, and the spray volume of a single layer can reach the spray volume of the original two layers. The limestone slurry passes through the nozzle 4 to form mist droplets, which are fully mixed with the bottom-up flue gas to achieve the purpose of efficiently removing SO ₂ in the flue gas.

As shown in Figure 1, the external circulating slurry pipe 5 is connected to the internal spraying main pipe 3, and the slurry in the slurry tank at the bottom of the absorption tower is transported to the spraying system through the pipeline, and then evenly sprayed to the absorption by the nozzle 4 in the spraying system. The section inside the tower.

As shown in Figure 2, the supporting steel beam 7 inside the absorption tower fixes the spray main pipe 3 system stably through the alloy hoop; at the same time, the casing interface 2 and the support 6 disperse part of the load of the spray system on the absorption tower body 1 on the tower wall.

As an example: there are 7 spray main pipes 3 on one side of each spray system, and there are 14 spray main pipes 3 on both sides of a layer, and the spray nozzles 4 are directly separated from both sides of the spray main pipe 3 . The spray main pipe 3 of each layer is fixed on the internal supporting steel beam 7 by hoops, and the supporting steel beam 7 is horizontally fixed in the absorption tower. The desulfurization efficiency before transformation is 93%-94.5%, and the desulfurization efficiency after transformation is 98%.

Claims (3)

1. the interactive spray system of fume desulfurating absorption tower, it is characterized in that: system is parallel to be stratified and set in absorption tower body (1), every layer comprises the many female pipe of spray (3), nozzle (4), support steel beam (5) and bearing (6) compositions; The female pipe (3) of spray be subtend parallel arrangement successively, and the diameter dimension of the female pipe (3) of spray is reduced to distal step is trapezoidal section by section by near-end, and in pipeline, evenly, each nozzle (4) flow is identical for flow velocity; The female pipe (3) of spray is through the cover interface tube (2) be welded on absorption tower body (1) and outer loop slurry pipe (5) Flange joint, and stretch into absorption tower body (1), small end is placed on bearing (6), and centre is fixed on support steel beam (7) by anchor ear; The outer loop slurry pipe (5) of every layer is all connected with perpendicular supervisor (8).

2. the interactive spray system of fume desulfurating absorption tower according to claim 1, is characterized in that: the female pipe (3) of spray adopts FRP material, and nozzle (4) adopts carbofrax material.

3. the interactive spray system of fume desulfurating absorption tower according to claim 1, is characterized in that: nozzle (4) adopts FRP to be intertwined and connected with the female connection of managing (3) of spray.